/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Delegate fired when a session's member is removed from the session
typedef TMulticastDelegate_TwoParams< void, [FName](API\Runtime\Core\UObject\FName), const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & > FOnSessionParticipantRemoved